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General background description of the ecosystem

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The Joint Norwegian-Russian Environmental Status Report for the Barents Sea

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General background description of the ecosystem

Abiotic impact

Abiotic impact This subchapter describes effects of variation in the physical part of the ecosystem on biological groups. Such links are strong and important for the overall dynamics of the Barents Sea ecosystem. For example, variation in temperature has significant effects on reproduction and recruitment of several of the large fish stocks, and variation in ice cover may have considerable effects on primary productivity.

Last Updated ( Wednesday, 03 February 2010 10:09 )

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Oceanographic conditions - Currents and transports

Oceanographic conditions - Currents and transports

Observed current in the Fugløya-Bear Island region is predominantly barotropic, and reveals large fluctuations in both current speed and lateral structure (Ingvaldsen et al., 2002; 2004). In general, the current is wide and slow during summer and fast, with possibly several cores, during winter. The volume transport resembles the velocity field and varies with season due to close coupling with reg...

Last Updated ( Friday, 22 January 2010 11:32 )

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Phytoplankton - Species composition and diversity

At the moment, there are 307 distinguishable species of pelagic micro algae registered in the Barents Sea, not including multiple subspecies and varieties (Makarevich, Larionov, 1992; Matishov et al., 2000). Taxonomically, 7 of them belong to the golden algae, Cryophyte, 148 – diatoms, 123 – dynophytes, 5 – green algae, 4 – to Haptophyta division, 8 – to Prasinophyta division and 6 species – to Eu...

Last Updated ( Friday, 22 January 2010 11:43 )

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Fisheries and other harvesting - General description of the fisheries

Fisheries and other harvesting - General description of the fisheries

The major demersal stocks in the Northeast Arctic include cod, haddock, saithe, and shrimp. In addition, redfish, Greenland halibut, wolffish, and flatfishes (e.g. long rough dab, plaice) are common on the shelf and at the continental slope, and ling and tusk at the slope and in deeper waters. In 2008, catches of nearly 900 thousand tonnes (provisional figures) are reported from the stocks of cod,...

Last Updated ( Friday, 22 January 2010 11:59 )

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Abiotic impact - Phytoplankton and zooplankton

Abiotic impact - Phytoplankton and zooplankton

Distinctions in quantitative distribution, structure and rates of development of phyto- and zooplankton are connected with the temperature influence, related to ocean currents and the distribution of the ice and the ice edge. Many species of phytoplankton have a rather wide tolerance range for parameters such as temperature and salinity, and also adapt to different levels of light down to its very...

Last Updated ( Friday, 22 January 2010 12:07 )

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Oceanographic conditions - Water masses and stratification

Oceanographic conditions - Water masses and stratification

Atlantic Water is commonly defined as having salinity >35.0 and temperatures >3oC. Between Norway and Bear Island, the temperature of Atlantic Water varies seasonally and inter-annually from 3.5-7.5 oC. As a rule, both temperature and salinity decrease in northwards and eastwards in the Barents Sea (Figure 2.3.6). For this reason, water with salinity as low as 34.95 is often classified as wa...

Last Updated ( Friday, 22 January 2010 11:31 )

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Phytoplankton - Seasonal succession

According to several studies, general structure of the succession cycle of phytoplankton in the Barents Sea could be split up into different phases covering a time period of the year. These phases will be the winter phase (low activity), spring phase (covering the onset of and spring bloom maximum), summer phase, and the autumn phase. These periods shows characteristic species composition, abundan...

Last Updated ( Friday, 22 January 2010 11:43 )

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Fisheries and other harvesting - Mixed fisheries

Fisheries and other harvesting - Mixed fisheries

The demersal fisheries are highly mixed, usually with a clear target species dominating, and with low linkage to the pelagic fisheries (Table 2.5.2). Although the degree of mixing may be high, the effect of the fisheries varies among the species. More specifically, the coastal cod stock and the two redfish stocks are presently at very low levels. Therefore, the effect of the mixed fishery will be ...

Last Updated ( Friday, 22 January 2010 11:59 )

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Abiotic impact - Benthos shellfish and squid

Abiotic impact - Benthos  shellfish and squid

Boreal-arctic species dominate the biomass of benthos in the Barents Sea (as well as throughout the arctic shelf), and have an optimum temperature range lying within the long-term temperature mean of the region. According to this latter theory, any deviation from the long-term mean has a negative impact on boreal-arctic species reproduction, abundance, and biomass. Some studies suggest that the de...

Last Updated ( Friday, 22 January 2010 12:07 )

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About BarentsPortal

Polar bears partying on a dead whale carcass. Photo NPI

The BarnetsPortal is a combined web site. It consist of two main elements; presentation of the Joint Norwegian-Russian environmental status report and the Map service. The Report will be updated at regular intervals - initially started with data from 2008. The Map service will continually publish environmental theme data as they become available. Read more...

Status Report. The authors

Puffins in the Barents Sea. Photo NP 

More than 100 experts from a total of 9 Russian and 20 Norwegian institutions have participated in the preparation of the report, and the work has been organized in 13 expert groups. The work has been led by Sevmorgeo and PINRO on Russian side and on Norwegian side by the Institute of Marine Research and the Norwegian Polar Institute..

Find author name here...

Sponsors

The BarentsPortal is a project implemented under the Joint Norwegian-Russian Commission on Environmental Protection. The Portal is a joint Norwegian - Russian instrument designed for the mutual exchange and presentation of information and environmental data relevant to the management of the Barents Sea. It is intended to serve as the future tool for updating of the recently published Norwegian - Russian environmental status report (published here), and for further cooperation on ecosystem-based management of the Barents Sea. 
Ministry of the Environment
Ministry of Natural Resourses of the Russian Federation

The Russian - Norwegian cooperation

Waving kelp at the Norwegian coast. Photo IMR

BarentsPortal is a project developed under the Joint Russian - Norwegian Commission on Environmental Cooperation. The joint environmental report is a co-operation project between the Joint Russian - Norwegian Commission on Environmental Cooperation and the Joint Russian-Norwegian Fisheries Commission

Read about Joint Russian - Norwegian Commission on Environmental Cooperation (unfortunately only in Norwegian - please use web based translation)

Read about the Joint Russian-Norwegian Fisheries Commission

Recommended reading

 

General description of the Barents Sea ecosystem

The Barents Sea is a sub-Arctic shelf ecosystem located between 70° and 80°N. It connect...

 

Current status of the ecosystem

 

Aspects of future change

The following aspects of possible long-term changes in the ecosystem are discussed in the ...

 

Issues relevant for ecosystem management

The following themes are highlighted as examples of issues that are relevant for developme...

 

Future needs for monitoring and integrated status reports

The expected increases in the number and type of impacts on the ecosystem put a premium on...

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